Dual-temperature compensation refrigerator and method for realizing dual-temperature compensation

Abstract

The invention discloses a dual-temperature compensation refrigerator. The dual-temperature compensation refrigerator comprises a freezing chamber, a refrigerating chamber, a compressor, a door body, an outer shell, a first temperature compensation heater and a second temperature compensation heater, wherein a foamed interlayer is respectively arranged inside the door body, between the freezing chamber and the outer shell and between the refrigerating chamber and the outer shell; an evaporator is arranged at the periphery of the refrigerating chamber; a temperature controller is arranged on the foamed interlayer which is located at the top part of the refrigerator; the first temperature compensation heater is located in the foamed interlayer which is at one side of the evaporator; the second temperature compensation heater is located at the inner part of the temperature controller; the first temperature compensation heater after being connected in series with a first temperature sensing switch is connected in parallel with the temperature controller; and the second temperature compensation heater after being connected in series with a second temperature sensing switch is connected in parallel with the temperature controller. The dual-temperature compensation refrigerator has the advantages of a low-temperature resistant capability, easy implementation, no seasonal restriction and the like, not only can prevent the temperature of the freezing chamber from rising again efficiently, but also can be started up normally in a low-temperature environment.

Description

technical field [0001] The invention relates to the field of refrigerators, in particular to a double temperature compensation refrigerator and a method for realizing double temperature compensation of the refrigerator. Background technique [0002] The refrigeration system of mechanical refrigerators mostly adopts the single-cycle refrigeration method, which is simple, economical and highly reliable. However, since the system controls the startup of the compressor based on the temperature of the evaporator in the refrigerating room, under low ambient temperature, the refrigerating room is prone to return to temperature. The room does not need to continue to refrigerate, so the compressor is turned off, but this temperature and the temperature of the freezer at this time cannot meet the refrigeration requirements of the freezer, causing the temperature of the freezer to rise. Therefore, in order to solve the above problems, temperature compensation is usually performed on t...

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Problems solved by technology

[0004] However, the above-mentioned temperature compensation is usually performed on the part where the evaporator is located. Using this compensation method, although the low temperature resistance of the refrigerator can be enhanced, it is prone to the problem that the thermostat cannot be started.

This problem is caused by the inherent characteristics of the fixed temperature reset type thermostat. Its inherent characteristic is that the temperature of the thermostat body must be greater than or equal to the temperature at the start-up point felt by the capillary of the thermostat. However, during the temperature compensation process of the existing refrigerator, due to Due to the limited installation position of the electric heater, the capillary can only be heated above the start-up point temperature, and it cannot be guaranteed that the temperature of the thermostat body is greater than or equal to the start-up point temperature felt by the capillary tube of the thermostat.

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